Sash lift and lock.



E. MAWDSLEY. SASH LIFT AND LOCK.

APPLICATION mum MAR. 1, 1910.

Patented Sept. 20, 1910.

Eliza Nawdsley' #GAM.

WITNESSES:

'ing

ELIZA MAWDSLEY, 0F ALTON, ILLINOIS.

SASE LIFT AND LOCK.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed March 7, 1910. Serial No. 547.907.

To all whom it ma'y concem:

Be it known that I, ELIZA MAWDSLEY,

citizen of the United States, 'residin at Alton, in the county of Madison and tate of Illinois, have invented certain new and useful Improvements in Sash Lifts and Locks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof. My invention has relation to improvements in sash-lifts and locks; and it consists in the novel details of construction more fully set forth in the specification and pointed out in v the claim.

In the drawingal igure 1 is a front elevation of my sash-lift "and look, with sashes and window frame shown dotted; Fig. 2 is a horizontal section on the line 22 of Fig. 1; Fig. 3 is a vertical sectional detail on the line 3-3 of Fig. 5; Fig. 4 is an enlarged horizontal sectional detail on the line 4. 4. of Fig. 1, with sashshown in full Fig. 5 is a vertical enlarged sectional'detail on the line 5-5 of Fig. 2; and Figs. 6 and 7 represent diagrammatic views showing the course of travel of the cables for lifting the lower sash or raising the 11 per sash (when the latter has been lowere The object of my invention is to construct a combined sash-lift and look, by which either the lower or up or sash may be manipulated and controlled through the o eration of a common actuating spindle or s aft,.either sash being 0 ened or closed as desired, and when opene to any distance, may be automatically locked, so that a window can be left open to any desired degree without danger of the sash changing its position.

Theadvantages of the invention will be better ap arent from a detailed description thereof w ich is as follows Referring to the drawings, F re resents the window-frame, S the lower ant S the up or sash as usual.

' represents the sill, and B a box or casbelow the sill in the wall of the house, wherein a portion of the operating parts of the. device are housed, another portion being exposed on the outside of said casing.

Mounted between the front and rear verti-' cal walls of the casing is a spindle or shaft 1, the inner end of which term nates in a head 2 operating in a cavity 3 in the rear wall, the head preventing the accidental withdrawal of the spindle, and the cavity allowing for the necessary longitudinal movement to which the spindle is subjected as presently to be seen. Mounted loosely on the spindle are a pair of sprocket wheels 4,4, identified respectively with the sashes S, S. The sprocket wheels are spaced apart by their abuttin hub portions h, h in which are forms the contiguously located 'ooves 5, 5 respectively, said grooves being adapted to alternately receive or be brought into coiiperation with, the feather 6 carried by the spindle, the spindle being movable longitudinally in its bearings a sufficient distance to bring the feather 6 into engagement with the roove 5 of the sprocket 4-, and then with the groove 5' of t e s rocket 4', depending on which sash is to e raised or lowered. In this longitudinal movement or shifting, the 5 indie is limited in one direction or outward y by the head 2, and'inwardly by the ratchet disk 7 mounted on the outer projecting portion of the spindle, the ratchet arresting such inward movement by coming in contact with the outer wall of the casing B. The outer end of the spindle terminates in a handwhcel 8 provided with a handle 9. The ratchet disk is engaged by a pawl 10 sub stantially of the form as shown (Fig. 3), the pawl being normally held in engagement with the.ratohet by a flexed spring. 11, the parts bein mounted on a suitable plate 12.

he sproc ct-wheels l, 4 are periphcrall grooved, the teeth being dis osed on eacli side of the groove, so that eac sprocket has two sets of teeth, each set engaging its own sprocket chain, one chain at having its inner vertical lap secured by staples 13 to one side of the sash S and the other chain 1) having its inner vertical lap correspondingly secured to the opposite side of the same sash a like arrangement applyin to the sash S.

The chain a asses aroun suitable guide pinions or id ers m, the chain 6 passing around correspondin idlers m, and an additional idler n, all isposed on the window frame. The two horizontal bottom laps of the chain a pass around the outer set of teeth ofthe sprocket wheel 4: (Fig. 2,) the upper horizontal lap of the c ain b on a mg the bottom of the inner set of teeth 0 t e wheel 4, while the lower horizontal lap passes loosely over the smooth periphery of the wheel between the teeth. What is true of the chains operating one sash S, is true of the chains operating the sashS, and a description of one will answer for the other.

If we turn the hand-wheel 8 to the left as indicated by the arrow (Fig. 1) the draft on the two' chains will be in a direction to exert a pull on the outer vertical laps of both chains, a, b, so that the sash S w1ll be raised; and if released will be locked by the locking pawl 10 which prevents the ratchet 7 mounted on the spindle 1 from rotating in the opposite direction. To lower the sash S, the operator disengages the pawl 10 from the ratchet, turning the wheel 8 and spindle 1 in the opposite direction, which, has the effect of pulling down on the sash, the latter being asslsted by gravity in its descent. In order to operate the ratchet 4, the spindle 1 is pulled out so as to draw the feather 6 into'the groove 5 of the hub it. By pushing the shaft 1- inwardly its full limit, the featherfi will be withdrawn from engagement with the ratchet 4, entering the groove 5 of the ratchet 4, (Fig. 5), whereby the upper sash S may now be lowered Since to lower or open the upper sash, it must be moved downward, the operator releases the pawl 10 from the ratchet, turning the spindle to the right (or opposite to what would be the direction for raising the lower sash) which draws the upper sash down. By releasing the pawl, the sash is locked against an upward movement until restored by the operator by a turn of the spindle to the left. The dimensions of the pawl and ratchet are relatively such as to permit of a permanent engagement-between them for either of the extreme positions of the spindle, it being understood that the longitudinal movements of the spindle to 'efiect engagement .with either of the sprockets 4, 4 is insuflicient to disengage the pawl from its ratchet. When the spindle is shoved in half-way so as to cause the feather 6 to simultaneously engage the grooves 5, 5 of both wheels 4, 4, it is apparent that an unauthorized person can not move either sash from the outside of the window, as the wheels would be locked ically the separate chains or cables so that v the direction of travel thereof, for a raising of the lower sash (or a closing movement of the upper sash if previously lowered) is obvious at a lance from an inspection of the arrows. 5f course, a reverse travel of the' chains would correspond to a closin movement of the lower sash or a lowering o the upper sash as obvious.

The spindle 1 is prevented from being accidentally withdrawn by the inner limiting head 2 which strikes the wall at the side of the cavity 3.

' Having described my invention, what I claim is In combination with a vertically movable -i1pper and lower sash, endless sprocket chains secured to the sides of the respective sashes, idler pulleys for the chains, a centrally disposed rotatable longitudinally movable spindle mounted at the base of the window frame,apair of loosely mounted peripherally rooved sprocket wheels with teeth on eac side of the groove carried on the spindle, means on the spindle and sprocket wheels for efiecting alternate engagement between the respective wheels and spindle according to the direction of longitudinal movement imparted to the spindle,

a ratchet on the spindle, a lockingpawl therefor, onechain on the one side of each sash having a pair of laps meshing with the teeth-on one side of the peripheral groove of its corresponding sprocket wheel, the

other chains having each one lap meshing with the teethon the opposite slde of the groove, and another lap passing loosely along the groove, the-parts operating substantially as and for the purpose set forth.

In testimony whereof I aflix my signature, in presence of two witnesses.

WILLARD C. KILLEEN, CnAs. A.,BEoKnR. 

